1231469040 has 80 divisors (see below), whose sum is σ = 4018492800. Its totient is φ = 311106816.

The previous prime is 1231469033. The next prime is 1231469053. The reversal of 1231469040 is 409641321.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1231468989 and 1231469007.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130470 + ... + 139589.

It is an arithmetic number, because the mean of its divisors is an integer number (50231160).

Almost surely, 2^1231469040 is an apocalyptic number.

1231469040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231469040 is an abundant number, since it is smaller than the sum of its proper divisors (2787023760).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1231469040 is a wasteful number, since it uses less digits than its factorization.

1231469040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270094 (or 270088 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 1231469040 is about 35092.2931710084. The cubic root of 1231469040 is about 1071.8676555637.

The spelling of 1231469040 in words is "one billion, two hundred thirty-one million, four hundred sixty-nine thousand, forty".